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BASIC MATH
MUHAMMAD MUFTI SHOFIYULLOH
X-SOSIAL
NO.20
SOAL
■ Seorang saudagar mencampur 3 jenis the. Apabila ia mengambil 15kg teh jenis
pertama dan 5 kg teh jenis ke-2, maka harga rata-ratanya adalah Rp 2.500, apa bila
25kg teh jenis pertama dicampur dengan 15kg teh jenis ketiga,maka harga rata-
ratanya adalah Rp 2.230, jika 2kg teh pertama dicampurkan dengan 3kg the jenis ke-2
dan 5kg the jenis ketiga, maka harga rata-ratanya adalah Rp 2.750. tentukan harga 1kg
tiap jenis teh tersebut.
Ditanya ?
■ Seorang saudagar mencampur 3 jenis the. Apabila ia mengambil 15kg teh jenis
pertama dan 5 kg teh jenis ke-2, maka harga rata-ratanya adalah Rp 2.500, apa bila
25kg teh jenis pertama dicampur dengan 15kg teh jenis ketiga,maka harga rata-
ratanya adalah Rp 2.230, jika 2kg teh pertama dicampurkan dengan 3kg the jenis ke-2
dan 5kg the jenis ketiga, maka harga rata-ratanya adalah Rp 2.750. tentukan harga
1kg tiap jenis teh tersebut
Cara
■ Teh 1 = A
■ Teh 2 = B
■ Teh 3 = C
Cara
15A+5B=2500
25A+ 15C= 2630
2A+3B+5C=2750
Eliminasi
■ 15A+5B=2500
■ 25A+ 15C= 2630
■ = 50B – 90C = 9220
Eliminasi
■ 15A+5B=2500
■ 2A+3B+5C=2750
■ = -35B + 75C = -36250
Eliminasi
■ 50B – 90C = 9220
■ -35B + 75C = -36250
■ = 40B= 263600
B = 6.590
Penemuan C
■ 50B + 90C= 9.220
= 329.500 – 90C
C= 3588
Penemuan A
■ 15A + 5B = 3.500
■ 15A + 32950= 500
■ A = 2.163
Hasil
■ Teh 1 = A=2.163
■ Teh 2 = B=6.590
■ Teh 3 = C=3588
SPLTV SMA GLOBAL PRESTASI (MUHAMMAD MUFTI X SOS 1)

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SPLTV SMA GLOBAL PRESTASI (MUHAMMAD MUFTI X SOS 1)

  • 1. BASIC MATH MUHAMMAD MUFTI SHOFIYULLOH X-SOSIAL NO.20
  • 2. SOAL ■ Seorang saudagar mencampur 3 jenis the. Apabila ia mengambil 15kg teh jenis pertama dan 5 kg teh jenis ke-2, maka harga rata-ratanya adalah Rp 2.500, apa bila 25kg teh jenis pertama dicampur dengan 15kg teh jenis ketiga,maka harga rata- ratanya adalah Rp 2.230, jika 2kg teh pertama dicampurkan dengan 3kg the jenis ke-2 dan 5kg the jenis ketiga, maka harga rata-ratanya adalah Rp 2.750. tentukan harga 1kg tiap jenis teh tersebut.
  • 3. Ditanya ? ■ Seorang saudagar mencampur 3 jenis the. Apabila ia mengambil 15kg teh jenis pertama dan 5 kg teh jenis ke-2, maka harga rata-ratanya adalah Rp 2.500, apa bila 25kg teh jenis pertama dicampur dengan 15kg teh jenis ketiga,maka harga rata- ratanya adalah Rp 2.230, jika 2kg teh pertama dicampurkan dengan 3kg the jenis ke-2 dan 5kg the jenis ketiga, maka harga rata-ratanya adalah Rp 2.750. tentukan harga 1kg tiap jenis teh tersebut
  • 4. Cara ■ Teh 1 = A ■ Teh 2 = B ■ Teh 3 = C
  • 6. Eliminasi ■ 15A+5B=2500 ■ 25A+ 15C= 2630 ■ = 50B – 90C = 9220
  • 8. Eliminasi ■ 50B – 90C = 9220 ■ -35B + 75C = -36250 ■ = 40B= 263600 B = 6.590
  • 9. Penemuan C ■ 50B + 90C= 9.220 = 329.500 – 90C C= 3588
  • 10. Penemuan A ■ 15A + 5B = 3.500 ■ 15A + 32950= 500 ■ A = 2.163
  • 11. Hasil ■ Teh 1 = A=2.163 ■ Teh 2 = B=6.590 ■ Teh 3 = C=3588